Photographic shutter



March 31, 1936. BA E 2,035,684

PHCTOGRAPHIC SHUTTER Filed Nov. 21, 1934 2 Sheets-Sheet 1 7 March 31, 1936. A, BARENYI PHOTOGRAPHIO SHUTTER 2 Sheets-Sheet 2 Filed Nov. 21, 1934 I If!!! rill will 27 lNVEN TOR ATTORNEY Patented Mar. 31, 1936 UNITED STATES PATENT OFFICE PHOTOGRAPHIC SHUTTER company of Germany Application November 21, 1934, Serial No. 754,062 In Germany November 23, 1933 8 Claims.

My invention relates to improvements in phoographic shutters, and the object of the improvement is to provide a shutter which is simple in construction and reliable in operation. With this object in view between a member such as a rotary ring for directly operating the blades and a hand operated device for imparting movement to said operating member an intermediate member is provided which is adapted to be directly engaged by the said hand operated device for opening the shutter, a latch being pro- I vided by means of which the said intermediate member may be locked in position for opening the shutter, and being adapted to be directly engaged by the said hand operated device, upon a second operation thereof, for releasing the intermediate member and permitting the same to close the shutter. Another object of the improvements is to provide a shutter in which the 20 said intermediate member controlled by the hand operated device may also be used for releasing the motor or master member.

Thus in my improved shutter mechanism the said intermediate member and its hand operated 25 device may beused for making time exposures,

in which case the said latch is in operative position, or ball exposures in which case the said latch is made inoperative, and it may also be used for making instantaneous exposures.

30 For the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawings in which the same reference characters have been used in all'the views to indicate corresponding parts. In said 36 drawings,

v Fig. 1 is a fragmentary elevation showing a.

part of the shutter, the front plate and other parts being removed for clearly showing the mechanism,

Fig. 2 is a similar elevation showing the parts in the positions after the first operation of the hand operated device, the intermediate member being locked by its latch for making a time exposure,

46 Fig. 3 is an elevation similar to the one illustrated in Figs. land 2 and showing the hand operated device at the end of the first operation and in initial position and ready for a second operation for moving the latch away from 50 the intermediate member, Y

Fig. 4 its similar elevation showing the hand operated device in engagement with the said latch and about to retract the same from the intermediate member,

55 Fig. 5 is a fragmentary elevation similar to the one illustrated in Figs. 1 to 4, and showing in addition the means connecting the intermediate member with the pawl controlling the movement of the motor or master member, the said intermediate member being out of engagement with the blade operating member and in engagement with the said pawl of the motor or master member, and the hand operated device being in engagement with the intermediate member and about to operate the same for releas ing the motor or master member,

Fig. 6 is a similar elevation showing in addition a hand operated cam ring, controlling the intermediate member, its latch, and a link connecting the motor or master member with the blade operating member,

Fig. 7 is a sectional elevation taken on the line 11 of Fig. 6, and

Fig. 8 is an elevation viewed in the direction of the arrows 88 the side wall of the shutter casing being removed.

In the figures I have shown a shutter of the pivoted blade symmetrical opening type.

The shutter comprises the usual annular casing i having an exposure or lens opening 2 normally closed by blades 3, the said blades being confined between the rear wall 4 of the casing and a partition member 5 upon which latter most of the shutter operating mechanism hereinafter described is carried.' Each of the blades is mounted on a pivot bolt 6, and it is provided with a slot 1 engaged by a pin 8 secured to an annular operating member 9. Thus, theblades 3 are opened and closed by reciprocating rotary movement imparted to the member 9, as is known in the art. At its front side the shutter casing is closed by an annular plate 41.

At a part of its circumference the operating member 9 carries a toothed segment III, which is fixed thereto by a pin l I, and which is in engagement with teeth i2 of a disk 43 which is mounted on a pivot bolt H. The disk I3 is acted. upon by a coiled spring 34 tending to turn the same in a direction for closing the shutter, and it is adapted to be turned in opposition to the said spring by a hand operated device comprising a cylinder l5 secured to the partition member 5, a plunger is and a rod H. The bottom I! of the said cylinder'is formed with the usual inwardly tapering and screw-threaded bore l9 adapted to have the usual ball or Bowden cable securedthereto, and it is formed with a bore 20 thropgh which the wire of the Bowden cable is connected with the bottom of the plunger l8. 'In the construction shown in the figures the cylln- 5 der is formed with a longitudinal slot 2| for the passage of a pin 22 fixed to the bottom of the plunger |6 for direct operation thereof. At its inner end the rod I1 is made integral with a disk 23 hearing on the inner face of. the bottom of the plunger for holding the rodlaxlally of the cylinder l5. Between the said disk and a head 24 secured to the end of the cylinder |5 a coiled spring 33 is interposed which tends to force the plunger |6 inwardly and to place the disk 23 close on the bottom, so that the rod i1 is located axially of the cylinder. But the spring permits the rod l1 to be moved outwardly and inwardly and towards the center of the shutter, the head 24 being provided with a slot 25 permitting such displacement. The disk I3 is formed with a forwardly directed concave arm 26 which is normally located in position for engagement with the rod l1, so that the disk is turned anti-clockwise by outward movement of the plunger 6 and the rod H, and when the disk is thus turned the rod I1 is slightly tilted inwardly, as is shown in Fig. 2.

' Near the disk |3 a latch 21 is mounted on a pivot bolt 28 fixed to the partition member 4, and the said latch is formed. with a nose 29 adapted to engage a nose 3|] formed on the disk l3, and the said noses are located so that the latch is adapted to lock the disk i3 in the posiin looking position the said arm 32 is in position for being engaged by the end of the rod |1 being forced outwardly.

On the partition member 4 a motor or master member 35 of. any known or preferred construction is mounted. The construction of the said motor or master 'member is known in the art, and therefore I deem it not necessary to describe the samein detail. It has been described in the patent of the United States No. 1,856,308 granted to me May 3, 1932. By means of the said motor or master member instantaneous exposures may be made, and for regulating the time of the exposure the motor'or master member is provided with any known or preferred retarding devices. Such retarding devices have not been shown in the figures, because they are known in the art and do not form a part of my present invention.

The spring housing of the said motor or master member is formed with an eccentric disk 36 on which a link 31 is mounted. The said link adapted to engage a pin 39 fixed to the member,

9, a spring 40 tending to hold the link and the member 9 in engagement with each other.

The motor or master member 35 is adapted to be locked in position by means of a pawl 4| pivotally mounted at 42 and engaging a shoulder 43 of the housing of the motor or master member. The said pawl ismade integral with a rear extension 44 formed with a toothed portion 45 located in position for engagement with the teeth of a disk 46 connected with the disk l3 the said parts being arranged'so that by anticlockwise rotary movement of the disk 46 the rear extension 44 of. the pawl 4| is moved in a direction for releasing the motor or master member.

As is shown'in Fig. 5, the pivot bolt l4 of the formed at its end with a cam face 54.

disks 3, 46 is not directly fixed to the partition member 5, but it is mounted on a pair of links 50 mounted on the pivot bolt 28. Thus the said disks may be set into positions either for engagement with the operating member 9 or with the teeth 45 of the pawl 4|, the spring 34 tending to throw the disk out of engagement with the operating member 9 and into engagement with the toothed portion 45. Further, the latch 21 is adapted'to be locked in position against the action of the spring 3| so that it is not able to get into locking engagement with the disk I 3. For this purpose a cam ring 5| is provided circumferentially of the lens opening 2, and the said ring is formed with a hook shaped portion 52 embracing an axial extension 53 of the pivot bolt l4 and Further it is formed with a concentric slot 55 having an enlarged end portion 56 providing a cam 51, a pin 58 carried by a heel 59 of the latch 21 bein passed through said enlarged portion. Fina ly the ring 5| is formed with a circumferential portion 60 on which normally a pin 6| of the link 31 bears, and with a camportion 62.

To the cam ring 5| a pin 63 is fixed which pro-. jects through a concentric slot made in the annular plate 41 and carries a head 64 for operation of the ring 5| by hand.

The operation of the shutter is as follows:

If it is desired to make a time exposure, the disk 5| is set into the position shown in Fig. 6, in which the disk I3 is in engagement with. the toothed segment III, the latch 21 is released, 'and the link 31 is retracted from the pin 39. At the beginning of the operation the'parts are. in the position shown in Fig. 1. The operator forces the plunger l6 outwardly, so that the rod |1 en-i gages the arm 26, thus turning the disk |3 anticlockwise. The rotary movement imparted to the disk is transmitted to the operating member 9 which thereby opens the shutter. At the end of the outward movement of the plunger l6 the latch 21 gets with its nose 29 into locking engagement with the shoulder 30 of the disk 3. Now the parts are in the positions shown in Fig. 2. As appears from this figure the rod I1 is slightly turned inwardly. Now the plunger I6 is released, and it is forced inwardly and into initial position by the spring 33, and the said spring acting on the disk 23 also sets the rod |1 into the original position and axially of the cylinder |5. Now the shutter is held open by the latch 21 engaging the disk l3. At the end of the desired time of exposure the plunger I6 is again forced outwardly and now it engages the arm 32 of the latch 21, which therefore releases the disk l3 and permits the spring 34 to return the member 9 into initial position and to close the shutter. Finally, the plunger I6 is released, and it is pressed by the spring 33 into the cylinder l5, whereupon the parts are again in the position shown in Fi 1.

If it is desired to make a ball exposure, the disk 5| is turned anti-clockwise so far that the cam face 51 engages the pin 58 and retracts the latch 21 from the disk I3, whilethe said disk is still in engagement with the toothed segment l0, and the link 31 is out of engagement with the pin 39. The operator forces the plunger 6 outwardly and thereby opens the shutter; and after the desired time of exposure he releases the plunger It, so that the disk 13 and the operating member 9 immediately return into initial position for closing the shutter.

If it is desired to make an instantaneous expo- Ind sure, the ring ii is further turned anti-clockwise, until the link 31 is released and engages the pin 39, and thedisks It, 46 are released, so thatthe disk It is retracted from the toothed segment l0, and the disk 48 is thrown into engagement with the toothed portion 45 of the pawl II. The latch 21 is still out of engagement with the disk 21. Now the desired time 01' exposure is set by means 01' the retarding mechanism of the motor or master member, and the motor or master member is set by means of the usual setting lever. If the instantaneous exposure is to be made the operator forces the plunger l6 outwardly, whereupon the rod ll engages the arm 26 and turns the disks it, it anti-clockwise, and by such anti-clockwise movement the pawl ll is retracted from the motor or master member, which therefore causes instantaneous exposure.

I claim:

1. In a shutter for photographic cameras, the combination, with the blades, an operating member therefor, a motor or master member, and a member controlling the operation of said motor or master member, of a hand operated device, an intermediate member adapted for driving engagement with said blade operating member and said controlling member, and hand operated means for selectively throwing said intermediate memher into engagement with said blade operating member and said member controlling the operation of the motor or master member.

2. A shutter as claimed in claim 1, in which said motor or master member is normally out of engagement with said blade operating member, and in which hand operated means are provided for throwing said motor or master member into engagement with said blade operating member.

3. A shutter as claimed in claim 1, in which means are provided for locking said intermediate member in position after operation by said hand operated device, said locking means being in position when in looking position for being thrown out of locking engagement with said intermediate member by said hand-operated device, and in which hand operated means are provided for controlling said locking .means.

4. In a shutter for photographic cameras, the combination, with the blades, and an operating member therefor, of a rotary disk in driving engagement with said blade operating'member, a hand operated device including a rod adapted for a latch adapted to lock said rotary disk in the position into which it has been turned by said hand operated device, said latch being adapted when in locking position to be directly engaged by said hand operated device and to be thrown thereby out of locking engagement with said rotary disk, and hand operated means for setting said latch out of position for locking engagement with said disk.

5. A shutter as claimed in claim 4, comprising in addition a motor or master member, a pawl for locking the same in set position and adapted to be engaged by said disk and to be thrown thereby out of locking engagement with said motor or master member, and hand operated means for selectively setting said disk in position for engagement with said blade operating member and said pawl and for setting said motor or master member into and out of driving engagement with said blade operating member.

6. A shutter as claimed in claim 4, in which the said disk and the latch are each provided with a concave arm in position for engagement with the'said rod.

7,. A shutter as claimed in claim 4, in which the hand operated device comprises a cylinder, a piston reciprocating therein, a rod formed at its inner end with a disk bearing on said. piston, and a spring within said cylinder bearing on said disk and adapted to force the piston inwardly and to hold said disk close on said piston and permitting the disk and its rod to be turned laterally.

8. In a shutter for photographic cameras, the combination, with the blades, and an operating member therefor, of a rotary disk in driving engagement with said blade operating member, a hand operated device including a rod adapted for loose engagement with said disk and for being moved thereby out of its normal position, means tending to return said rod into. normal position, and a latch adapted to lock said rotary disk in the position into which it has been turned by said hand operated device, said latch being adapted when in looking position to be directly engaged by said hand operated device and to be thrown thereby out of locking engagement with said romy disk.

- ARPAD BARENYI. 

